From a885d6786f40fd0c4dbcb09a17f6e103d0949ed7 Mon Sep 17 00:00:00 2001
From: Eric Anholt <anholt@freebsd.org>
Date: Fri, 6 Dec 2002 02:27:30 +0000
Subject: Add vblank signal code for BSD DRM. Untested so far, but working with
a 4.2.0 userland at least.
---
bsd-core/drmP.h | 11 +++++++++
bsd-core/drm_dma.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++------
2 files changed, 69 insertions(+), 7 deletions(-)
(limited to 'bsd-core')
diff --git a/bsd-core/drmP.h b/bsd-core/drmP.h
index b7b21da4..541bc2eb 100644
--- a/bsd-core/drmP.h
+++ b/bsd-core/drmP.h
@@ -392,6 +392,14 @@ typedef struct drm_map_list_entry {
drm_map_t *map;
} drm_map_list_entry_t;
+TAILQ_HEAD(drm_vbl_sig_list, drm_vbl_sig);
+typedef struct drm_vbl_sig {
+ TAILQ_ENTRY(drm_vbl_sig) link;
+ unsigned int sequence;
+ int signo;
+ int pid;
+} drm_vbl_sig_t;
+
struct drm_device {
#ifdef __NetBSD__
struct device device; /* NetBSD's softc is an extension of struct device */
@@ -469,6 +477,8 @@ struct drm_device {
#if __HAVE_VBL_IRQ
wait_queue_head_t vbl_queue; /* vbl wait channel */
atomic_t vbl_received;
+ struct drm_vbl_sig_list vbl_sig_list;
+ DRM_SPINTYPE vbl_lock;
#endif
cycles_t ctx_start;
cycles_t lck_start;
@@ -613,6 +623,7 @@ extern drm_buf_t *DRM(freelist_get)(drm_freelist_t *bl, int block);
#endif /* __HAVE_DMA */
#if __HAVE_VBL_IRQ
extern int DRM(vblank_wait)(drm_device_t *dev, unsigned int *vbl_seq);
+extern void DRM(vbl_send_signals)( drm_device_t *dev );
#endif
#if __REALLY_HAVE_AGP
diff --git a/bsd-core/drm_dma.c b/bsd-core/drm_dma.c
index 5632b5a2..69c66c9a 100644
--- a/bsd-core/drm_dma.c
+++ b/bsd-core/drm_dma.c
@@ -524,6 +524,11 @@ int DRM(irq_install)( drm_device_t *dev, int irq )
TASK_INIT(&dev->task, 0, DRM(dma_immediate_bh), dev);
#endif
+#if __HAVE_VBL_IRQ
+ DRM_SPININIT( dev->vbl_lock, "vblsig" );
+ TAILQ_INIT( &dev->vbl_sig_list );
+#endif
+
/* Before installing handler */
DRM(driver_irq_preinstall)( dev );
@@ -612,21 +617,67 @@ int DRM(wait_vblank)( DRM_IOCTL_ARGS )
DRM_COPY_FROM_USER_IOCTL( vblwait, (drm_wait_vblank_t *)data,
sizeof(vblwait) );
- if ( vblwait.type == _DRM_VBLANK_RELATIVE ) {
- vblwait.sequence += atomic_read( &dev->vbl_received );
+ if (vblwait.request.type & _DRM_VBLANK_RELATIVE) {
+ vblwait.request.sequence += atomic_read(&dev->vbl_received);
}
- ret = DRM(vblank_wait)( dev, &vblwait.sequence );
-
- microtime( &now );
- vblwait.tval_sec = now.tv_sec;
- vblwait.tval_usec = now.tv_usec;
+ flags = vblwait.request.type & _DRM_VBLANK_FLAGS_MASK;
+ if (flags & _DRM_VBLANK_SIGNAL) {
+ drm_vbl_sig_t *vbl_sig = DRM_MALLOC(sizeof(drm_vbl_sig_t));
+ if (vbl_sig == NULL)
+ return ENOMEM;
+ bzero(vbl_sig, sizeof(*vbl_sig));
+
+ vbl_sig->sequence = vblwait.request.sequence;
+ vbl_sig->signo = vblwait.request.signal;
+ vbl_sig->pid = DRM_CURRENTPID;
+
+ vblwait.reply.sequence = atomic_read(&dev->vbl_received);
+
+ DRM_SPINLOCK(&dev->vbl_lock);
+ TAILQ_INSERT_HEAD(&dev->vbl_sig_list, vbl_sig, link);
+ DRM_SPINUNLOCK(&dev->vbl_lock);
+ ret = 0;
+ } else {
+ ret = DRM(vblank_wait)(dev, &vblwait.request.sequence);
+
+ microtime(&now);
+ vblwait.reply.tval_sec = now.tv_sec;
+ vblwait.reply.tval_usec = now.tv_usec;
+ }
DRM_COPY_TO_USER_IOCTL( (drm_wait_vblank_t *)data, vblwait,
sizeof(vblwait) );
return ret;
}
+
+void DRM(vbl_send_signals)( drm_device_t *dev )
+{
+ drm_vbl_sig_t *vbl_sig;
+ unsigned int vbl_seq = atomic_read( &dev->vbl_received );
+ struct proc *p;
+
+ DRM_SPINLOCK(&dev->vbl_lock);
+
+ vbl_sig = TAILQ_FIRST(&dev->vbl_sig_list);
+ while (vbl_sig != NULL) {
+ drm_vbl_sig_t *next = TAILQ_NEXT(vbl_sig, link);
+
+ if ( ( vbl_seq - vbl_sig->sequence ) <= (1<<23) ) {
+ p = pfind(vbl_sig->pid);
+ if (p != NULL)
+ psignal(p, vbl_sig->signo);
+
+ TAILQ_REMOVE(&dev->vbl_sig_list, vbl_sig, link);
+ DRM_FREE(vbl_sig);
+ }
+ vbl_sig = next;
+ }
+
+ DRM_SPINUNLOCK(&dev->vbl_lock);
+}
+
#endif /* __HAVE_VBL_IRQ */
#else
--
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